en/builder/src/echarts/component/brush/BrushView.js

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import * as echarts from '../../echarts';
import * as zrUtil from 'zrender/src/core/util';
import BrushController from '../helper/BrushController';
export default echarts.extendComponentView({
  type: 'brush',
  init: function (ecModel, api) {
    /**
     * @readOnly
     * @type {module:echarts/model/Global}
     */
    this.ecModel = ecModel;
    /**
     * @readOnly
     * @type {module:echarts/ExtensionAPI}
     */

    this.api = api;
    /**
     * @readOnly
     * @type {module:echarts/component/brush/BrushModel}
     */

    this.model;
    /**
     * @private
     * @type {module:echarts/component/helper/BrushController}
     */

    (this._brushController = new BrushController(api.getZr())).on('brush', zrUtil.bind(this._onBrush, this)).mount();
  },

  /**
   * @override
   */
  render: function (brushModel) {
    this.model = brushModel;
    return updateController.apply(this, arguments);
  },

  /**
   * @override
   */
  updateTransform: updateController,

  /**
   * @override
   */
  updateView: updateController,
  // /**
  //  * @override
  //  */
  // updateLayout: updateController,
  // /**
  //  * @override
  //  */
  // updateVisual: updateController,

  /**
   * @override
   */
  dispose: function () {
    this._brushController.dispose();
  },

  /**
   * @private
   */
  _onBrush: function (areas, opt) {
    var modelId = this.model.id;
    this.model.brushTargetManager.setOutputRanges(areas, this.ecModel); // Action is not dispatched on drag end, because the drag end
    // emits the same params with the last drag move event, and
    // may have some delay when using touch pad, which makes
    // animation not smooth (when using debounce).

    (!opt.isEnd || opt.removeOnClick) && this.api.dispatchAction({
      type: 'brush',
      brushId: modelId,
      areas: zrUtil.clone(areas),
      $from: modelId
    });
    opt.isEnd && this.api.dispatchAction({
      type: 'brushEnd',
      brushId: modelId,
      areas: zrUtil.clone(areas),
      $from: modelId
    });
  }
});

function updateController(brushModel, ecModel, api, payload) {
  // Do not update controller when drawing.
  (!payload || payload.$from !== brushModel.id) && this._brushController.setPanels(brushModel.brushTargetManager.makePanelOpts(api)).enableBrush(brushModel.brushOption).updateCovers(brushModel.areas.slice());
}